// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

package utility

import (
	"context"
	"time"
)

type contextKey string

const requestTimeContextKey = contextKey("requestTime")

func ContextWithRequestTime(ctx context.Context, t time.Time) context.Context {
	if RequestTime(ctx).IsZero() {
		return context.WithValue(ctx, requestTimeContextKey, t)
	}
	return ctx
}

func RequestTime(ctx context.Context) time.Time {
	t, ok := ctx.Value(requestTimeContextKey).(time.Time)
	if !ok {
		return time.Time{}
	}
	return t
}
